bf there are lots of good sealants out there. The last couple gear cases I had apart I used the ultra black that aquasonic recommended. I like it, these new sealants are impressive! To do a good job on a gear case takes some attention to detail. The shift rod seal is usually the culprit. The case needs to be totally torn down to change that seal. The seal under the water pump is not so easy to get out. Remember to put some sealant on the screw heads when reassembling. Those screws are on the grease side of the case edges where you put the sealant. You should have the gear case separated from the power head. If not turn the motor over on its rewind. There are alignment pins in both brass bearing. Those pins must be in the proper position for assembly to be correct.
dale.
